Gas-lamp.



' C. A. CAMPBELL.

GAS LAMP.

APPLICATION FILED DEC. 3,

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Patented June 20 2 SHEETS-SHEET I- 5/ 32 In! |l|- H 77 r E H ;3 I ,1 r r 1 I! 27 28 1 I 33 39 l 4.5 a 30 32 40 43 40 C. A. CAMPBELL.

GAS LAMP.

APPLICATION man 050. a. $914.

Lmww Patented June 20,1916.

2 SHEETS-SHEET 2- Tim COLUMBIA PLANOGRAPH (10., WASHINGT CHARLES A. CAMPBELL, OF NEW YORK, N. Y.

GAS-LAMP.

Specification of Letters Patent.

Application filedDecember 3, 1914. Serial No. 875,229.

Gas-Lamps, of which the following is a de-- scription in such full, clear, and exact terms as will enable any person skilled in the art to which it pertains to make and use the same.

My invention relates to an improvement in inverted incandescent gas lamps the object of which is to simplify the construction of such lamps and thereby render them less expensive to produce and more certain and durable in operation.

It is also an object of my invention to construct an incandescent gas lamp which, as such, will be as perfect as possible and which will yet simulate closely the well known indirect electric light fixture, now very extensively employed for indoor lighting, in which the light is thrown upward against the ceiling and sometimes shaded at the under side.

To this end the invention consists in certain novel features of construction and combination of elements which will be fully set forth hereinafter and particularly pointed out in the claims.

The accompanying drawings illustrate as an example the preferred form of the in vention.

In these drawings-Figure 1 is a central vertical section of the lamp. Fig. 2 is a sectional plan on the line 22 of Fig. 1. Fig. 3 is a detail sectional plan on the line 3-3 of Fig. 1. Fig. A is a detail elevation of the gas cook operating arm. Fig. 5 is a do tail of the lock pawls of the gas cook with parts in section on the line 55 of Fig. 2 and Fig. 6 is a detail section of the gas cook on the line 6-6 of Fig. 2.

The lamp is supported from the ceiling or other supplying part by a gas pipe 10 which carries the metal canopy 11 serving to protect the ceiling from the heat. The pipe 10 is fastened into a lateral or three-'partfitting 12 preferably ;of cast metal which in turn has its central portion fastened to a central bar 14 forming part of the rigid frame work of the'lamp and preferably integral with the cast metal burner chamber or box 15. This box 15 is formed with an interior partition 15 producing two compartments, the function of which will be hereinafter pointed out and from the box arms 16 radiate to an integral band 17. These have sockets 17 in which other radial arms 18 are fastened and these extend to the encircling band or belt 19 and are secured to it by screws 20 or other means.

' The structure above outlined forms the rigid frame of the lamp and all parts of the lamp are mounted on and supported by said frame. In addition the parts 12 and 15 serve certain functions in the operation of the lamp which will be described in their order. The band 19 sustains a casing or globe section 21 which is preferably of glass and is contracted at its top to carry a mounted crown 22 of metal. The globe 21 is open at its topto exhaust the products of. combustion. At its lower edge the band 19 carries, by the usual screws 23, an imperforate globe 24: which envelops the whole bottom of the lamp. This arrangement of thetwo globes, one at the top and one at the bottom, with the band 19 surrounding the lamp between them, gives the before mentioned indirect electric light effect and if one or both of the globes are opaque (as they usually are) the casual observer will not recognize the lamp as gas operated.

The three part fitting 12 is tubular as shown, the tubular arm passing off laterally and downwardly from the pipe 10 and carrying at its lower end a tube 25 which extends to the nipple 26 of the Bunsen casting. This Bunsen casting has manifold parts which are illustrated in Figs. 1, 2, and 3. The nipple 26 communicates with the casing 27 of the cock plug 28 controlling the gas flow to the two branches29. As shown in Fig. 6 the plug 28 has a three-way passage and when in the position shown in that view opens both branches 29 to the gas supply, but if turned one quarter revolution will open one branch to the exclusion of the other according to'the extent of rotation of the plug.

As shown best in Figs. 1 and 4 the plug 28 has a four toothed ratchet 30 fastened on its'stem outside of the band 19, the stem extending through the band for this purpose. Mounted loosely on-the stem of the plug is an arm31 one end of wliich is weighted and the other furnished with an operating chain. This arm carries a dog 31 coacting Patented June 2o, rare.

10. ply gas to either branch to the exclusion of stroke of the arm"3l.

' openings 39 being with the ratchet, whereby the plug 28 may the other. 7 7

The branches 29 terminate in inward bends which carry the gas checks or regulators comprising constriction nipples 36 and needle valves 37, the latter extending outside of the branches and through the band 19 within easy reach of the operator. In this way the flow of gas through the checks may be regulated. 'Fromfthe nipples 36 the gas jets pass into the Bunsen tubes 38,

provided for the admissionpof atmospheric'air to form the Bunsen mixture. 'The Bunsen tubes 38 are in two sections (according'to the specific structure shown) and the inner and ma or sectionsare v same on opposite sides of the partition 15.

cast integral with the box -l5 and enter the In this manner the usual Bunsen mixture v maybe supplied at-will, in regulated proportions, to either or both chambers of the box 15.

'7 j The bottom of the box 1 5 on each side of the partition 15 is formed with preferably two-orifices to accommodate the usual ce-' ramic burner nipples 40 producing with the mantles41' four inverted incandescent lights which may be operatedsimultaneouslyor in stack or intensifier of air through the lamp.

exposed places.

groups of two according to the adjustment of the fplug 28. A pilot-light is provided by Y carrying inward a tubular extension 42 fromthe nipple 26 and fitting said extension with a pilot tube 43 whichdis'char'ges under the box 15 so that when the mixture is turned on the constantly burning pilot flame will ignite the gas mixture an'd start the operation of the lamp. Thispilot flame burns continuously unaffected by the cock-plug 28-and is regulated'bya separate needle valve 44 seated'in the extension. 42. Theband '17 may be fitted with 'a skirt 45 to collect the air supply which entersthroughthe open .top'

of theglobe 21; and 46"r'epresents a metal ,The operation and method of using my invention willbe apparent to those skilled in theart from the aforegoing description. 7'

It'will be noted that my invention provides fora most durable form of construction which insures the reliable operation of the lamp under all conditions of hard servto accelerate the draft 7 parts and by locating the regulating and Bunsen forming devices to one side they are protected from the heat and consequent destruction and may be reached for adjustment while the lamp is in operation.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A gas lamp having a mixing chamber to supply the burners, the chamber divided into two compartments, separate Bunsen forming devices respectively feeding said compartments, a gas supply, a three way cock controlling the gas movement to the Bunsen forming devices and burner mouth pieces adapted to carry mantles for each of the said compartment-s of the said chamber.

2. A gas lamphaving a mixing chamber divided into two compartments, separate burner mouth pieces adapted to carry mantles respectively communicating with said compartments, separate Bunsen forming de vices respectively communicating with said compartments and means for admitting the supply to one or both of said compartments.

3. A gas lamp having a mixing chamber divided into two noncommunicating compartments, each with a separate burner mouth piece, separate juxtaposed Bunsen forming devices leading respectively to the said compartments, a three-way gas cook for opening either or both of said Bunsen forming devices to their respective compartments and separate means on each burner mouth piece for carrying separate mantles under the same. 4. A gas lamp having a mixing chamber, burner mouth pieces at its underside, a gas supply pipe above the mixing chamber and from which the mixing chamber is supported, an elbow passing sidewise from the gas supply pipe, a gas pipe extending downward from the elbow, an annular frame member joined to the mixing chamber, a Bunsen forming device carried by the frame member and communicating with mixing chamber and'an intensifier tube supported on said annular frame member, the downward extending gas pipe passing outside of the intensifier.

5. A gas lamp having a mixing chamber divided into two compartments, burner mouth pieces respectively for said compart ments, Bunsen tubes respectively leading to the compartments of the chamber, Bunsen forming device for said tubes, gas supply means to the Bunsen forming devices, means for opening either or both of the Bunsen forming devices to the gas supply, an annular frame member rigid with the Bunsen tubes and mixing chamber and an exterior bandsupported from said frame member and surrounding the Bunsen forming device and mixing chamber and adapted to carry ar globe section. 1V A 6. A gas lamp having a mixing chamber eating with the Bunsen tubes and means for divided into two compartments, inverted controlling the gas supply to either or both burner devices respectively for each comof said Bunsen forming devices. partment, Bunsen tubes respectively leading In testimony whereof I have hereunto 5 into the compartments of the mixing chamsigned my name in the presence of tWo Wit- 15 ber, an encircling frame member surr0undnesses.

ing the mixing chamber and joined thereto CHARLES A. CAMPBELL. and to the Bunsen tubes, globe supporting Witnesses: means 01ned to the frame member, comple- PATRICK A. BOLGER, 10 mentary Bunsen formlng devlces communi: ENDA TANNER.

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